Projector and method of controlling projector

Abstract

A projector includes: an I/F unit to which an image signal is input; a display unit that displays an image based on the image signal input to the I/F unit; a shift device that changes a position of an image to be displayed by the display unit; a signal processing unit that outputs a driving signal to the shift device and drives the shift device; and a shift control unit that controls the driving signal output by the signal processing unit. The shift control unit changes an output timing of the driving signal to correspond to a change in a frequency of the image signal.

What is claimed is: 
     
       1. A projector comprising:
 a processor configured to receive an image signal as an input; 
 a display that displays an image based on the inputted image signal; and 
 an image displacement unit that changes a position of the image displayed by the display, wherein 
 the processor is configured to:
 output a driving signal to the image displacement unit to drive the image displacement unit; and 
 control the outputted driving signal such that an output timing of the driving signal is changed corresponding to a change in a frequency of the image signal by correcting a delay time of the output timing based on a difference between the frequency of the image signal and a preset frequency. 
 
 
     
     
       2. The projector according to  claim 1 , further comprising:
 a memory that stores information in which the frequency of the image signal is associated with the output timing of the driving signal, 
 wherein the processor acquires the output timing associated with the frequency of the image signal from the memory and outputs the driving signal at the acquired output timing. 
 
     
     
       3. The projector according to  claim 1 , wherein the processor calculates the output timing associated with the frequency of the image signal and outputs the driving signal at the calculated output timing. 
     
     
       4. The projector according to  claim 1 , wherein the processor sets a delay time of the output timing of the driving signal with respect to a vertical synchronization signal of the image signal. 
     
     
       5. The projector according to  claim 1 , wherein the processor changes the output timing of the driving signal in a case in which the frequency of the image signal is different from the preset frequency. 
     
     
       6. The projector according to  claim 5 , further comprising:
 a memory that stores information in which the frequency of the image signal is associated with the output timing of the driving signal; 
 wherein the processor is configured to:
 detect the frequency of the image signal; 
 calculate a correction value for correcting the output timing of the driving signal in a case in which the detected frequency is different from the preset frequency; and 
 correct the output timing of the driving signal acquired from the memory based on the calculated correction value. 
 
 
     
     
       7. The projector according to  claim 6 , wherein the processor is configured to:
 calculate a correction value for latening the output timing of the driving signal in response to the detected frequency being less than the preset frequency, and 
 calculate a correction value for advancing the output timing of the driving signal in response to the detected frequency being greater than the preset frequency. 
 
     
     
       8. The projector according to  claim 1 , wherein:
 the image displacement unit includes:
 an optical member, 
 a movable unit that holds the optical member, and 
 an actuator that pivots the movable unit, and 
 
 the processor changes a current value of a driving current to be supplied as the driving signal to the image displacement unit according to the frequency of the image signal. 
 
     
     
       9. The projector according to  claim 8 , wherein:
 the processor increases the current value of the driving current to be supplied to the image displacement unit in response to the frequency of the image signal being greater than the preset frequency, and 
 the processor decreases the current value of the driving current to be supplied to the image displacement unit in response to the frequency of the image signal being less than the preset frequency. 
 
     
     
       10. A projector comprising:
 a sensor that detects an attitude of the projector; 
 a processor configured to receive an image signal as an input; 
 a display that displays an image based on the inputted image signal; and 
 an image displacement unit that includes an optical member held to be pivotable and changes a position of an image displayed by the display to a first display position and a second display position according to the detected attitude of the optical member, wherein 
 the processor is configured to:
 output a driving signal to the image displacement unit to drive the image displacement unit; and 
 control the outputted driving signal by setting a waveform of the outputted driving signal output according to the attitude of the projector detected by the sensor. 
 
 
     
     
       11. A method of controlling a projector, the method comprising:
 inputting an image signal; 
 displaying, by a display, an image based on the image signal; 
 driving an image displacement unit according to a driving signal to change a position of the image to be displayed by the display; and 
 changing an output timing at which the driving signal is output to the image displacement unit according to a change in a frequency of the image signal by correcting a delay time of the output timing based on a difference between the frequency of the image signal and a preset frequency.